CVE-2011-1823KEV · OVERDUE

Android OS Privilege Escalation Vulnerability

High · published June 9, 2011

Patch now

Confirmed exploited, and the score agrees

CVSS calls it high at 7.8. It is confirmed in active exploitation. It sits in the 98.7th percentile for exploit probability.

1485
days past CISA
deadline
CVSS v3.1
7.8
EPSS
41%
Percentile
98.7
In the wild
Confirmed
What it is

🚨 A sneaky message on a PF_NETLINK socket is the key to unlocking root privileges on vulnerable Android devices! 🔥 Think of the vold volume manager as a bouncer at a nightclub who lets anyone sneak in just by waving their hand. If a local user knows just the right tricks—and the right negative index—they can bypass the checks and party like a VIP! This vulnerability allows local users to execute arbitrary code with root privileges, potentially leading to a complete compromise of the device. An attacker could gain full control, snoop on data, install malware, or modify system settings—all while masquerading as a trusted service. This is absolutely devastating for device security! ⚡️

Put simply

Think of the vold volume manager as a bouncer at a nightclub who lets anyone sneak in just by waving their hand. If a local user knows just the right tricks—and the right negative index—they can bypass the checks and party like a VIP! CVE-2011-1823 involves the vold volume manager daemon on Android trusting messages from a PF_NETLINK socket without proper validation. By exploiting a flaw in the DirectVolume::handlePartitionAdded method, an attacker can trigger memory corruption by using a negative index to bypass a signed integer check.

What to do

This vulnerability allows local users to execute arbitrary code with root privileges, potentially leading to a complete compromise of the device. An attacker could gain full control, snoop on data, install malware, or modify system settings—all while masquerading as a trusted service. This is absolutely devastating for device security! ⚡️ To mitigate this risk, update your Android device to version 2.3.4 or later immediately. Additionally, consider implementing strict access controls and regularly auditing local user permissions to minimize exploitation risks. Protect your device! 🛡️ You've got this! By following these steps, you'll strengthen your defenses and keep your Android device secure! 💪✨

The record
Technical detail
CVSS v3.1
7.8 · HIGH
Vector
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
CVSS v4.0
Not supplied
EPSS
0.41367 · 98.7th percentile
Published
2011-06-09T10:00Z
KEV added
2022-09-08 · due 2022-09-29
EPSS history
Timeline
  • 08 SEP 00:00Z
    Added to CISA KEV — remediate by Sep 29
    kev
  • 09 JUN 10:00Z
    The vold volume manager daemon on Android 3.0 and 2.x before 2.3.4 trusts messages that are received from a PF_NETLINK socket, which allows local users to…
    cvelistv5